The Clark County Museum is celebrating its 50th anniversary with an exhibit, “50 Years of Preserving History: Celebrating the Golden Anniversary of the Clark County Museum,” a look back at the history and growth of the oldest and largest museum in the Las Vegas Valley, whose collection numbers about 1 million artifacts. It is open through August 26, 2018. Other events: Museums Administrator Mark Hall-Patton will lead a free, one-hour tour of the museum grounds on the April 20 anniversary date at 11 a.m. Cake, coffee and drinks will be served to celebrate the occasion. Clark County will share an “artifact a day” for 50 days from the museum’s collection on social media. Look for them on Facebook, Tumblr, Twitter & Pinterest (@ClarkCountyNV). Look for similar occasional posts on the County’s Instagram feed. The Clark County Museum will also be active with similar posts during this time on its own Facebook page. The community is encouraged to use the hashtag #ClarkMuseum50. Hall-Patton, using the Clark County Museum’s Facebook page, will take questions live on Wednesday, April 11, 10 a.m. to noon, about the museum and local history from the community. Hall-Patton, using Clark County’s Twitter site (@ClarkCountyNV), will host a Twitter town hall about the museum and local history, taking questions live on Wednesday, April 18, 11 a.m. to noon. The community is encouraged to use the hashtag #ClarkMuseum50. Commissioner Jim Gibson and his colleagues on the board will declare April “Clark County Museum Month” and present a proclamation at their April 3 meeting at 9:05 a.m. The Henderson Chamber of Commerce, a subcommittee of which started the museum, will host a chamber mixer at the museum on April 26 from 4 to 7 p.m. For more information, please visit ClarkCountyNV.gov/Museum.